Eduardo Aníbal González Hernández (born November 23, 1974 in Mexico City, D. F.), better known as Juventud Guerrera, is a Mexican professional wrestler who is best known for his work in many wrestling promotions worldwide, including all the major American wrestling promotions, such as World Wrestling Entertainment, World Championship Wrestling, Extreme Championship Wrestling and Total Nonstop Action Wrestling, as well as the major Mexican wrestling promotions Asistencia Asesoría y Administración and Consejo Mundial de Lucha Libre.

Early in his career Guerrera was a mainstay in the Asistencia Asesoría y Administración promotion. He had a very lengthy feud with Rey Mysterio, Jr. in which they traded the AAA Welterweight Title back and forth. The pair also had several tag team matches in which Guerrera would team with his father Fuerza, while Rey, Jr. would tag with uncle and trainer Rey Misterio, Sr.

Guerrera wrestled in many Mexican independent promotions as a masked wrestler but he first gained American exposure in Extreme Championship Wrestling alongside fellow luchadores Rey Misterio Jr., Psicosis, Konnan and La Parka, all of whom were also wrestling for Konnan's Promo Azteca in Mexico at the time. When Konnan left for WCW, Guerrera and the rest followed.

Rey Gutierrez Mysterio Jr. (born December 11, 1974) is a Mexican American professional wrestler in World Wrestling Entertainment currently wrestling on the RAW Brand. In WWE, Gutierrez was trained by his uncle Rey Misterio, Sr. and wrestled early on in Mexico where he learned the Lucha Libre high flying style that has been his trademark.

Gutierrez originally worked for Asistencia Asesoría y Administración (AAA) in Mexico, from 1992 to 1995. He wrestled in Extreme Championship Wrestling (ECW) from 1995 to 1996 and World Championship Wrestling (WCW) from 1996 to 2001, as Rey Misterio, Jr./Rey Mysterio, Jr. but dropped the "Junior" from his name when he began working for WWE in 2002.

Mysterio is known for having a high flying style, which helped kick-start the cruiserweight wrestling revolution in the United States in the late 1990s during his time in WCW. In WCW he won the WCW World Tag Team Championship three times, and the WCW Cruiserweight Tag Team Championship once with Billy Kidman as part of the Filthy Animals. In WWE, Mysterio is a three time world champion having held the World Heavyweight Championship twice, the WWE Championship once and is currently listed as the lightest world champion in WWE history. He has also held the WWE Tag Team Championship a record-tying four times, and the WWE Intercontinental Championship twice. He also held the WCW/WWE Cruiserweight Championship a record eight times (five times in WCW, three in WWE). All totaled, he has won 21 titles between WWE and WCW. Mysterio was the 21st person to win the WWE Triple Crown Championship, and was the winner of the 2006 Royal Rumble.

Peter Alan Gruner, Jr. (born May 11, 1974) is an American professional wrestler, trainer, and wrestling producer, better known by his ring name Billy Kidman. Kidman is best known for his work with World Championship Wrestling (WCW) and his current workplace of the WWE throughout the late 1990s, early to late 2000s, and now into the early 2010s. He trained the likes of Wade Barrett in Florida Championship Wrestling.

He joined World Championship Wrestling (WCW) and ultimately gained fame as a key member of several strong wrestling factions. In addition to being a member of Raven's Flock, he also was a member of the Filthy Animals and later New Blood. As a member of these factions, Gruner participated in memorable rivalries with top WCW names, including Hulk Hogan, Jeff Jarrett, and Rey Mysterio. Kidman wrestled for WCW for many years and won tag team gold with partner and real life friend Mysterio. After leaving the group, he won the WCW Cruiserweight Championship three times. Gruner also met his now ex-wife Torrie Wilson while the two were working in WCW.